upng.cpp File Reference

#include "upng.h"
#include <stdlib.h>
#include <string.h>

Include dependency graph for upng.cpp:

Classes
struct	huffman_tree
struct	upng_t

Macros
#define	MAKE_BYTE(a, b, c, d)   (((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
#define	CHUNK_IHDR   MAKE_BYTE('I', 'H', 'D', 'R')
#define	CHUNK_IDAT   MAKE_BYTE('I', 'D', 'A', 'T')
#define	CHUNK_IEND   MAKE_BYTE('I', 'E', 'N', 'D')
#define	FIRST_LENGTH_CODE_INDEX   257
#define	LAST_LENGTH_CODE_INDEX   285
#define	NUM_DEFLATE_CODE_SYMBOLS   288
#define	NUM_DISTANCE_SYMBOLS   32
#define	NUM_CODE_LENGTH_CODES   19
#define	MAX_BITS   15
#define	MAX_BITS_SPECIAL   7
#define	SET_ERROR(upng, code)   do { (upng)->error = (code); (upng)->error_line = __LINE__; } while (0)
#define	upng_chunk_length(chunk)
#define	upng_chunk_type(chunk)   MAKE_BYTE((chunk)[4], (chunk)[5], (chunk)[6], (chunk)[7])
#define	upng_chunk_critical(chunk)   (((chunk)[4] & 32) == 0)

Typedefs
typedef struct huffman_tree	huffman_tree

Functions
upng_t *	upng_new_from_bytes (const unsigned char *buffer, unsigned long size)
void	upng_free (upng_t *upng)
upng_error	upng_header (upng_t *upng)
upng_error	upng_decode (upng_t *upng)
unsigned int	upng_get_width (const upng_t *upng)
unsigned int	upng_get_height (const upng_t *upng)
unsigned int	upng_get_bpp (const upng_t *upng)
const unsigned char *	upng_get_buffer (const upng_t *upng)
unsigned int	upng_get_size (const upng_t *upng)
upng_format	upng_get_format (const upng_t *upng)
upng_error	upng_get_error (const upng_t *upng)

Macro Definition Documentation

CHUNK_IDAT

#define CHUNK_IDAT   MAKE_BYTE('I', 'D', 'A', 'T')

CHUNK_IEND

#define CHUNK_IEND   MAKE_BYTE('I', 'E', 'N', 'D')

CHUNK_IHDR

#define CHUNK_IHDR   MAKE_BYTE('I', 'H', 'D', 'R')

FIRST_LENGTH_CODE_INDEX

#define FIRST_LENGTH_CODE_INDEX   257

LAST_LENGTH_CODE_INDEX

#define LAST_LENGTH_CODE_INDEX   285

MAKE_BYTE

#define MAKE_BYTE	(		a,
			b,
			c,
			d
	)		(((a) << 24) | ((b) << 16) | ((c) << 8) | (d))

MAX_BITS

#define MAX_BITS   15

MAX_BITS_SPECIAL

#define MAX_BITS_SPECIAL   7

NUM_CODE_LENGTH_CODES

#define NUM_CODE_LENGTH_CODES   19

NUM_DEFLATE_CODE_SYMBOLS

#define NUM_DEFLATE_CODE_SYMBOLS   288

NUM_DISTANCE_SYMBOLS

#define NUM_DISTANCE_SYMBOLS   32

SET_ERROR

#define SET_ERROR	(		upng,
			code
	)		do { (upng)->error = (code); (upng)->error_line = __LINE__; } while (0)

upng_chunk_critical

#define upng_chunk_critical

(

chunk

)

(((chunk)[4] & 32) == 0)

upng_chunk_length

#define upng_chunk_length

(

chunk

)

Value:

    ( \
    ((unsigned long)(chunk)[0] << 24) | \
    ((unsigned long)(chunk)[1] << 16) | \
    ((unsigned long)(chunk)[2] << 8) | \
    ((unsigned long)(chunk)[3]))

upng_chunk_type

#define upng_chunk_type

(

chunk

)

MAKE_BYTE((chunk)[4], (chunk)[5], (chunk)[6], (chunk)[7])

Typedef Documentation

huffman_tree

typedef struct huffman_tree huffman_tree

Function Documentation

upng_decode()

upng_error upng_decode

(

upng_t *

upng

)

upng_free()

void upng_free

(

upng_t *

upng

)

upng_get_bpp()

unsigned int upng_get_bpp

(

const upng_t *

upng

)

upng_get_buffer()

const unsigned char * upng_get_buffer

(

const upng_t *

upng

)

upng_get_error()

upng_error upng_get_error

(

const upng_t *

upng

)

upng_get_format()

upng_format upng_get_format

(

const upng_t *

upng

)

upng_get_height()

unsigned int upng_get_height

(

const upng_t *

upng

)

upng_get_size()

unsigned int upng_get_size

(

const upng_t *

upng

)

upng_get_width()

unsigned int upng_get_width

(

const upng_t *

upng

)

upng_header()

upng_error upng_header

(

upng_t *

upng

)

upng_new_from_bytes()

upng_t * upng_new_from_bytes	(	const unsigned char *	buffer,
		unsigned long	size
	)